SAP Lead Software Engineer interview questions

After applying in LinkedIn, recruiter from SFO office contacted me and scheduled a phone screen. Phone interview was about 30 minutes. Questions were around transaction management, UML, OOPS concepts etc. Not very hard. First got feedback that they will not be proceeding further. Then suddenly after two weeks, recruiter came back to say they want me to attend in-person. No interviewer names were provided nor the agenda. At the in-person interview, they made me wait extra 15 minutes citing that interviewers are in a meeting. In the in-person interview, the interviewers were very much particular about UML symbols in class diagrams and drawing Entity-Relationship diagrams in Database design. Felt they are still in very much old-school mode of software development.